ADD 796141 - pagebuf mostly ignores pb_count_desired

[pv@xxxxxxxxxxxxx (dxm@xxxxxxxxxxxx)]

View Incident: 
http://co-op.engr.sgi.com/BugWorks/code/bwxquery.cgi?search=Search&wlong=1&view_type=Bug&wi=796141

 Status : open                         Priority : 3                         
 Assigned Engineer : btg               Submitter : dxm                      
*Modified User : dxm                  *Modified User Domain : engr          
*Description :
(Rusell & I have been discussing this one - just wanted to 
keep the info central)

If a buffer is allocated with a certain size then the actual 
number of bytes to read/write is set to a smaller value with
XFS_BUF_SET_COUNT, pagebuf ignores the small value and
reads/writes the whole buffer.

This only occurs in XFS in the log code, specifically in
xlog_bread, xlog_bwrite, xlog_write_log_records and 

.....


==========================
ADDITIONAL INFORMATION (ADD)
From: dxm@engr (BugWorks)
Date: Jul 12 2000 09:23:35PM
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sigh: Last sentence should read "_fear_ of repercussions".
It seems to work well.